Rec.games.pinball ruled the land for a long time. Many web based forums tried to best rgp. Until Pinside they never caught on. Pinside started with very good forum software and lots of useful features which finally got users (including me) to move over. Even the reasonable monetization strategy seems to be a winner. IMO the hard work and persistence over time of the pinside creators is why the forum succeeded and continues to thrive. Congrats on 20 years to the pinside team!